A double-blind study of progestogen treatment in spontaneous abortion. (Preliminary report).
D000033:Abortion, Threatened / Q000188:drug therapy*; D002986:Clinical Trials as Topic; D005260:Female; D006801:Humans; D006908:Hydroxyprogesterones / Q000627:therapeutic use*; D010919:Placebos; D011247:Pregnancy
D006908:Hydroxyprogesterones; D010919:Placebos